Back-spring construction.



W! A. FALLS.

BACK SPRiNG cowsmucnom. I APPLICATION FILED OCT. 2!. I918. 1,295,287., Patented Feb. 25, 1919 2 $HEETSSHEEI l.

w. A. FALLS. I BACK SPRING CONSTRUCTION.

APPLICATION FILED OCT. 21. 1918..

1,295,287. Patented Feb. 25, 1919.

2 SHEETS-SHEET 2.

3mm WW WW7 15, WWJWW UNITED STATES PATENT ornron.

WILLIAM A. FALLS, or DETROIT, MICHIGAN, ASSIGNOR T0 PREMIER ousHIoiv. SPRING 00., or DETROIT, MICHIGAN, A CORPORATION or MICHIGAN;

BACK-SPRING GONSTRUGTIOIFQ To all whom it may concern:

Be it known that .1, WILLIAM A. FALLS, a citizen of the United States of Amerlca, residing at Detroit, in the county. of Wayne and State of Michigan, have invented certain new and useful Improvements in Back- Spring Construction, of which the following is a specification, reference being bad thereln to the accompanying drawings.

In the manufacture of back springs for vehicle seats wherein provision is made for a resilient upper edge alon the upper rail of the seat back, it is desirc le not only that the parts be securely stayed so as to avoid displacement under the uses to which they are subjected, but also to insure resiliency so that the staying means is not a detriment to the structure.

This invention relates to back springs for vehicle seats and to an arrangement thereof whereby the upper rounded portion'which is arranged to arch above the back ofthe seat, is not only stayed against lateral displacement but is arranged so as to be extremely pliable and to maintain its position under severe shock and continual use.

The invention consists in the matters hereinafter set forth, and more particularly pointed out in the appended claims,

In the drawings,

Figure 1 is a view in front elevation of a back spring structure that embodies features of the invention;

Fig. 2 is a view in side elevation of the device, and

Fig. 3 is a view in detail of a portion of one of the back springs.

As herein shown in preferred form, a rim frame 1 of suitable design and material, preferably of wire, has an inset upper edge or side 2 adapted to rest upon the upper face of the frame of a seat back to which the spring structure is applied.

A wire or rod of spring material is bent between the end thereof to form a pair of long, outcurved, upright arches the lower slightly convergent portions 3 and 4 of which have inturned, overlying parts 5 and 6 secured as by a clip 7 or other suitable means, to the base wire 8 of the back frame. The upper portions 9 of these arms are bent over to arch above the offset 2 of the main frame, to the top wire 10 of which inturned portions are held by clips 11 or the like. Be-

Specification of Letters Patent; Patented Feb. 25, 1919. Application filed October 21, 1918'. Serial No. 259,092.

tween the clips 11, the middle portion of the wire is curved upwardly and outwardly to form a depending double-armed arch 17 with a cross connection 18; Each of the arches or shorter bends, has a triangular loop .12 or depending eyelet formed therein with upper, overlapping, rounded corners 13 and 14 that embrace an inserted cross stay 15. A cross strip 20 of the back frame supports a series of upright helical springs 21, preferably of hourglass type, the upper closed coil 22 of each being connected by a clip 23 or the like to the cross connection 18 of the double arch 17 The arms of each upright spring are threaded through the upper turn 22 of the companion spring 21 and are likewise passed under and over the closed top, coil 24 of a second upright helical spring 25 supported on a second c'ross strip 26, the arching of the upright springs causing a slight tilting of the turns 22 and 2a from normal position so that the latter are frictionallysecured in position.

It will be noted that by this construction there are no clips between the upper coils of the supporting helices and the elongated loops of the upright wires, while at the same time perfect support is afforded the latter. The triangular or widely open loop of the upper bend of each wire at the crest-of the back of the construction, permits lateral compression of the wire without releasing the same from the stay so that there is no rigidity caused at any local point by the connection of the cross stay wires with the uprights.

As a result, the construction while very pliable and elastic so as to support upholstery readily, is at the same time extremely rigid to prevent permanent deformation.

Obviously, changes in the details of construction may be made without departing from the spirit of my invention.

What I claim is 1. A back spring structure comprising a back frame having an inbent upper side, a pair of oppositely disposed upright spring loops having the lower end portions thereof secured to the lower side of'the frame and the upper end portions extended above the frame and inbent and secured to the inset sides, the upper portion of the bends being provided with depending wide loops, the

upper corners of which are rounded and in overlapping relation and a stay wire threaded through the opposed rounded corners of the said loops.

2. A back spring structurecomprising a,

' through the opposed rounded corners of the said; loop, and spiral springs supporting the loops between the end portions thereof.

3. A back spring constructioncomprising a back frame, upright loop wires. having the lower ends inturned, overlapped and secured to the lowest side of the back seat frame, and the-upper end portionsbent to arch above a back seat frame and secured to theupper side thereof, the respective wires being inturned and reverted. to form another bend corresponding to the outer bend with the lower portion thereof inturned, the wires of each pair overlapping and being secured together, and the upper bends of the wire both of. thelong and short portions having triangular loops the upper rounded corners of Copies of this patent may be obtained for which overlap and form eyelets through which the stay wire is threaded.

at. A back spring construction comprising a back frame, upright loop wires having the lower ends inturned, overlapped and secured to the lowest side of the back seat frame, and the upper end portions bent to arch above the back seat frame and secured to the upper side thereof, the respective wires being inturned and reverted to form another bend corresponding to the outer bend with the lower portion thereof inturned, the wires of each pair overlapping and being securedtogether, the upper bends of the wire both'of the long and short portions having triangular loops the upper rounded corners'of which overlap and form eyelets through which a stay wire is threaded, and upright helical wires also secured to the back frame between the bodies of the loops and the frame, the upper turns thereof being clipped to the depending short bend portions of the wires and being threaded by the longer arm portions of the loops.

In testimony whereof I affix my signature in the presence of two Witnesses.

WILLIAM A. FALLS.

Washington, D. G. 

